工艺参数对AZ31镁合金往复挤压过程的影响
运用刚黏塑性有限元法对不同工艺参数下的AZ31镁合金往复挤压过程进行了热力耦合数值模拟，研究了不同初始坯料温度、挤压速率和摩擦因数对往复挤压过程中等效应变、等效应力及温度场的影响。结果表明：在往复挤压过程中，挤压速率对等效应变峰值影响不大，随着挤压速率的增大，工件内温度峰值直线上升，温度分布不均匀程度增大，应力峰值先增加后减小；随着初始坯料温度升高，等效应力峰值呈直线趋势减小；摩擦因数对温度峰值的影响很小，随着摩擦因数的增大，等效应变峰值先增大然后趋于平稳，等效应力峰值增大，其增大幅度减小。...
Saved in:
| Published in | 材料工程 no. 5; pp. 70 - 75 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
西安理工大学材料科学与工程学院,西安,710048%河南理工大学材料科学与工程学院,河南焦作,454000
2012
|
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4381 1001-4381 |
| DOI | 10.3969/j.issn.1001-4381.2012.05.014 |
Cover
| Summary: | 运用刚黏塑性有限元法对不同工艺参数下的AZ31镁合金往复挤压过程进行了热力耦合数值模拟，研究了不同初始坯料温度、挤压速率和摩擦因数对往复挤压过程中等效应变、等效应力及温度场的影响。结果表明：在往复挤压过程中，挤压速率对等效应变峰值影响不大，随着挤压速率的增大，工件内温度峰值直线上升，温度分布不均匀程度增大，应力峰值先增加后减小；随着初始坯料温度升高，等效应力峰值呈直线趋势减小；摩擦因数对温度峰值的影响很小，随着摩擦因数的增大，等效应变峰值先增大然后趋于平稳，等效应力峰值增大，其增大幅度减小。 |
|---|---|
| Bibliography: | 11-1800/TB reciprocating extrusion ; processing parameter ; AZ31 magnesium alloy ; numerical simulation LIU Jun, GUO Xue-feng, ZHANG Zhong-ming, YE Yong-nan（1 School of Materials Science and Engineering,Xi＇an University of Technology, Xi＇an 710048,China;2 School of Materials Science and Engineering, Henan Polytechnic University,Jiaozuo 454000, Henan,China） The rigid visco-plastic finite element method was used for the study on the coupling thermal- mechanical numerical simulation of reciprocating extrusion process of AZ31 magnesium alloy. The influence of initial temperature of blank, extrusion velocity and friction factor on the equivalent strain, equivalent stress and temperature field of reciprocating extrusion process was investigated. The results show that the extrusion velocity has little effect on the peak value of equivalent strain, with the increasing of the extrusion velocity, the peak value of temperature within the workpiece ascends linearly, the temperature distribution becomes more inhomogeneous, w |
| ISSN: | 1001-4381 1001-4381 |
| DOI: | 10.3969/j.issn.1001-4381.2012.05.014 |